diff --git a/compareECLFiles.cmake b/compareECLFiles.cmake
index 45d68acca..296141376 100755
--- a/compareECLFiles.cmake
+++ b/compareECLFiles.cmake
@@ -502,6 +502,13 @@ add_test_compareECLFiles(CASENAME udq_in_actionx
                          REL_TOL ${rel_tol}
                          DIR udq_actionx)
 
+add_test_compareECLFiles(CASENAME co2store
+                         FILENAME CO2STORE
+                         SIMULATOR flow
+                         ABS_TOL ${abs_tol}
+                         REL_TOL ${rel_tol}
+                         DIR co2store)
+
 if (opm-common_EMBEDDED_PYTHON)
   add_test_compareECLFiles(CASENAME udq_pyaction
                            FILENAME PYACTION_WCONPROD
diff --git a/tests/update_reference_data.sh b/tests/update_reference_data.sh
index 1ac622474..c4b929409 100755
--- a/tests/update_reference_data.sh
+++ b/tests/update_reference_data.sh
@@ -141,6 +141,7 @@ tests[model6_msw]="flow model6 1_MSW_MODEL6"
 tests[norne_reperf]="flow norne NORNE_ATW2013_B1H_RE-PERF"
 tests[compl_smry]="flow compl_smry COMPL_SMRY"
 tests[3d_tran_operator]="flow parallel_fieldprops 3D_TRAN_OPERATOR"
+tests[co2store]="flow co2store CO2STORE"
 
 changed_tests=""